If you're referencing the bottom picture, that would be the grind or heel geometry. The picture above shows the knife's profile.
Both these work, though the bottom one holds an edge better
Down the rabbit hole wheeeeeeeeeee.........
Thanks for your insight! Luckily my Show White is base mounted...
This is the thing that comes into mind when I asked this. No one knows how to do it by hand anymore, the sacred art is lost, the "pros" I mean.